Power Issues with MacBook

Hi everyone,

Iam having some issues with my sister-in-laws MacBook pro. Long story short, water was spilled on the keyboard. I was given the MBP when the battery expanded to twice its size. I replaced the battery and that appeared to fix any problems. While I was searching, I looked for any sign of corrosion in the mobo and there was none. There was minor staining on th ebottom of the trackpad. After rebooting, the trackpad functioned normally.

About one month later I got the MBP back, it would not turn on. Battery indicator just blinked rapidly. When I plugged in the power cord, the green light came on, but never changed to orange. I have tried resetting SMC, PRAM and NVRAM. Nothing worked. The computer would not turn on.

I then tried unplugging the power adapter, holding the power button, while holding the power I plugged in the power cord and the light didn't turn on. I let go of the power button, and pressed it ... It turned on. Fans were running high, green light on power cable. It was a black screen and beeped three times with five second delay. I removed one ram stick, same thing. Removed the other and replaced it with the first one. It booted.

It went to a grey log in screen (no log in tone by the way). I tried logging in and it wouldn't let me, a progress bar would pop up ... Go half way then reboot. I rebooted in safe mode and I could log in.

I have tried a new power cord, but that didn't work.

This is where I am at now. The battery icon shows that there is no battery, yet it's new. I am avoiding taking it to the Apple Store as mainly I would like to try to resolve myself first, also to save on costs.

Apple has determined that a small percentage of MacBook Pro systems may exhibit distorted video, no video, or unexpected system restarts. These MacBook Pro systems were sold between February 2011 and December 2013.

Apple or an Apple Authorized Service Provider will repair affected MacBook Pro systems, free of charge. See below for details on affected models and service options.

Symptoms

An affected MacBook Pro may display one or more of the following symptoms:

Distorted or scrambled video on the computer screen

No video on the computer screen (or external display) even though the computer is on

Computer restarts unexpectedly

Products affected

15-inch and 17-inch MacBook Pro models manufactured in 2011

15-inch MacBook Pro with Retina models manufactured from Mid 2012 to Early 2013

This problem definitely seems like something is damaged on the motherboard. However before even trying to make some measurements on the MB I would try another battery if that is the only issue you are having. New battery does not mean it is a good battery.

If another battery does not solve the issue post again here and we can troubleshoot further. Next time when doing water damage make sure the fan is completely dry before returning to the customer even if corrosion is not present. I always encourage a proper water damage treatment and visual inspection of bottom side of board.

Check data line end of R5280 & R5281, diode mode on multimeter, re dprobe on ground, black probe on each end of the resistor. 0.441 or 0.449 should be reading on both sides. If it's less, something is bringing down the data line. Start by removing BIL flex, then U7000, and if that doesn't do it 16v went to your SMC and it is &&^&@@ and good luck reballing that one.

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Repairability

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